Knee brace



FIG. 1 is a perspective view of a knee brace showing our new design in open condition;

FIG. 2 is an enlarged perspective view thereof in a closed condition;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is an end view thereof, as taken from the top of FIG. 3;

FIG. 6 is an end view thereof, as taken from the bottom of FIG. 2;

FIG. 7 is a end view thereof, as taken from the left side of FIG. 2; and,

FIG. 8 is an end view thereof, as taken from the right side of FIG. 2. 

The ornamental design for a knee brace, as shown and described. 